Laserfiche WebLink
not show the irregularities that are the consequence of <br /> excavation and slumping. <br /> Two composite samples were taken of the spoil piles, one <br /> from the east side spoil piles and one from the west side . <br /> i These samples were taken to FGL with the others . A 60 hour <br /> turn--around time for the sample data was requested as <br /> authorized by Mr. Pkatt; however, this was not achieved. <br /> !, DRA then took all samples to FGL, at about 5 : 25 PM. <br /> � TEST RESULTS <br /> :f F <br /> CHART A <br /> TESTS ON SOIL SAMPLES TAKEN 4/21/92 <br /> i; Units : ug/kg = ppb: mg/kg = ppm <br /> ND = Not detectable at level shown <br /> EPA 8020 :DLR . 003 mg/kg <br /> f 5030:DLR: 1 . 00 mg/kg <br /> C: TEST METHODS : BTEX: 8020 - TPH(D) : 5030 <br /> Samp.# Benzene Toluene E'Benzene Xylene TPH(D) <br /> 1 <br /> @ 20.1 ND ND ND ND ND <br /> 2 @ 17.' ND ND ND ND ND <br /> 3 @ 41, ND ND ND ND ND <br /> 4 @ 2Q' ND ND ND ND ND <br /> 5 @ 7 ' ND ND ND ND ND <br /> k. 6 @ 20'' ND ND ND ND 47-6-'D <br /> 7 @ 20 ' ND ND ND ND <3-0 O-m <br /> r <br /> SPOIL SAMPLES <br /> r Composites <br /> 1 East ND ND ND ND 9 . 6 <br /> f 2 West. ND ND ND ND 16 . 0 <br /> i <br /> 4 DISCUSSION OF TEST RESULTS <br /> As canbeseen on Table A above , essentially all 4 <br /> contaminated material was excavated. Only a minor amount of 3 <br /> contamination (TPH-D) was found in Sample #' s 6 and 7 at the <br /> pit bottom at 20 'bgl . Application of the LUFT manual <br /> Leaching Potential Analysis (Table 2-2, page 28 of LUFT) by <br /> WJH derives a score of 48 points; which indicates a t <br /> guideline of 1000 PPM TPH that can be left in place without <br /> damaging groundwater. In addition, the geologic conditions <br /> as noted earlier show the area to be primarily clay to about <br /> i` 150 ' bgl . Clay is not a positive aquitard but it is an <br /> I aquiclude; that is , permeability to liquid flow is .low, <br />` U <br /> 5 <br /> f -�� <br />